There are three taboos when working in jewelry stores: 1. When customers look at the products in front of the counter, the salesperson will spray detergent and wipe the jewelry counter. 2. As soon as the customer enters the store, some salespeople will shout hello and stare at the customer. 3. After the sales failure, the salespeople are unfriendly and often look ugly, which is quite different from the original smiling face.